Hakka dialect is the most prominent symbol of Hakka culture in Meizhou and the mother tongue of Hakka people. According to experts' research, there were many written expressions in Hakka dialects in Tang and Song Dynasties, which preserved a large number of ancient Chinese phonology in Tang and Song Dynasties. Moreover, there are many similarities between today's Hakka dialect and standard Mandarin (about 40% of the four or five thousand words commonly used in Chinese characters are not very different from Hakka dialect in pronunciation). As the ancestors of Hakkas are the gentry of the Central Plains, when they entered the mountainous area at the junction of Jiangxi, Fujian and Guangdong with this superior language and advanced Central Plains culture, they had an important influence on the local language. Therefore, Hakka dialect can be said to be a language dominated by Chinese and supplemented by Baiyue dialect in the Tang and Song Dynasties.